One problem related to seats has been reported for the 2002 Mercedes Benz ML320. The most recently reported issues are listed below.
Driving 2002 mercedes Ml320. Smelled burning. Pulled over and checked under hood and found no smell. When I got back into the car, I noticed a burned spot on the drivers seat. Corresponding burn mark was on my back left pant pocket. I turned of the seat warmer and the problem has stopped.